All participants will attend a one-time one-hour training session to explain cardiac coherence and how to use emWave Pro. Participants will be randomized to be either in the treatment group or the control group. Participants will use emWave Pro for at least one 5-minute session daily, Monday through Friday. The treatment participants will use it daily for all 12 weeks. The control participants will use it daily only for weeks 7-12. The treatment group will have the added component of weekly visits during the first 6 weeks of the study from an investigator and the research coordinator. The purpose of the weekly visits is focused on reinforcing accountability and achievement of coherence.